XP Resolves DNS with nslookup but not ping, traceroute, etc.

Today I encountered an unusual problem on a client system, they had been installing windows updates when the computer ran low on memory resources and crashed.  Following the crash they had lost all internet connectvity.  After some troubleshooting I determined it to be a DNS problem.  We could Ping DNS servers but not resolve domain names.  Changing DNS servers did not help nor did repairing the TCP/IP stack and a dozen other things I tried.  SFC /scannow did not turn up even a single invalid system file and windows was up to date with the exception of SP3.  I came to the conclusion it had to be a corrupt system file or something of the sort and in a last ditch effort installed SP3 knowing that Service Packs replace and reconfigure a large part of the system.  Sure enough once the system rebooted connectivity was restored.  So, while I do not have the problem pinned down I did see several others encountering this issue online – My best advice is to reinstall the latest service pack.  If any of you uncover more information on this issue please leave it in the comments.

Exchange SP2 Install Fails while installing Exchange Activesync

While performing a reinstall of Exchange SP2 I was presented with the following Error:

“Setup failed while installing sub-component Exchange ActiveSync with error code 0xC0070643 (please consult the installation logs for a detailed description).  You may cancel the installation or try the failed setup again.”

I took a look in the Exchange Server Setup Progress.log and found the following errors:

[10:30:57] Calling MSXML installer with command line:  “msiexec /i msxml3.msi /q reboot=”ReallySuppress””
[10:30:57] Process created … waiting (-1)
[10:30:58] Process has exited with 0x000643
[10:30:58] The command

msiexec /i msxml3.msi /q reboot=”ReallySuppress”

failed, returning error code 1603 (Fatal error during installation.). — ID:31136 — ScCreateProcess (f:\tisp2\admin\src\libs\exsetup\hiddenw1.cxx:1821)
Error code 0XC0070643 (1603): Fatal error during installation.

After a few Google searches I found the following forum Posting Here

In short – MSXML3 is already installed on the Server – The post outlines the following steps.

  1. Get a copy of the Windows Installer package for the version of MSXML 3 you have installed.
  2. Place a copy inside Exchsrvr\bin
  3. Rename the existing msxml3.msi to msxml3.msi.backup
  4. Make a copy of the latest version MSXML Windows Installer file and rename it to msxml3.msi.  This will leave you with msxml3.msi and msxml3sp?.msi (in my case msxml3sp7.msi).
  5. Click Retry on the error and it should continue as planned.

In my case I didn’t show MSXML 3 Installed – I had the following packages:

MSXML 4.0 SP2 (KB927978)
MSXML 4.0 SP2 (KB936181)
MSXML 4.0 SP2 Parser and SDK
MSXML 6.0 Parser (KB33579)

I tried a number of things but eventually came to the conlusion that I did in fact have MSXML 3.0 SP7 installed and it simply did not show in add remove programs.  I replaced the MSI with the download from this link:


After that I hit retry on the install and still had no luck – I then gave a reboot and a fresh attempt at the install a try using the updated MSI and it proceeded fine.